We got a jump in the parking lot and stalled at the loading dock. One of the security guys laughed at me when I asked if the battery would just re-charge itself if we drove it long enough. Took 3 hours to get a jump from a trucker and drove until we found a Canada Tire (small wall mart with auto shop). It was 5am and we were worried that if they couldn’t help us we’d be really stranded so we left the engine running when we went to sleep. It’s a diesel R/V. Once the shop opened the mechanic hooked it up to a monitor and said the battery was fine.